Square.



No. 7l0,509. Patented Oct. 7, 1902.

J. PHILLIPS.

SQUARE.

(Application filed Mar. 10, 1902.) (N u M o del.)

UNITED STATES PATENT OFFICE.

.IOHN PHILLIPS, OF CHICAGO, ILLINOIS.

SQUARE.

SPECIFICATION forming part of Letters Patent No. 710,509, dated October7, 1902.

Application filed March 10,1902. Serial No. 97,433. (No model.)

To cz/ZZ whom, t may concern:

Beit known that I, JOHN PHILLIPS, a citizen or" the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Squares; and I do herebydeclare the following to be afull, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the figures of reference marked thereon,which form a part of this specification.

This invention relates to squares, and particularly to folding steelsquares.

The object of the invention is to form an improved square which can bereadily disconnected and folded to be carried in a carpenters box.

A further object is to form an improved joint between the parts whichwill hold them rigidly together in true position for use.

The invention is illustrated in the accompanying drawings, in which-Figure lis a perspective view of the square, parts being broken away.Fig. 2 is a section on the line 2 2 of Fig. l. Fig. 3 is a face view ofone of the arms detached, and Fig. 4 is an edge View of the same. Fig. 5is a face View of the other arm detached, and Fig. 6 is a section on theline 6 6 thereof.

The arms (indicated at 6 and 7) are joined together by a lap-jointformed by halving the ends of the arms and beveling the laps,asindicated at 8. Furthermore, a mortise-andtenon joint is formed tomore rigidly retain the arms together. This is done by making or leavinga tenon 9 on the lap of the arm 6, and the top of this tenon is flushwith the face of the arm. A mortise l0 is formed in the lap of the arm 7to receive the tenon. The edges of the tenon and mortise are beveled, asat Il, which forms a better itting joint when the parts are clampedtogether than would otherwise be the case.

A boss l2 is formed on the tenon, and a threaded bore is formed in theboss and arm to receive a thu nib-screw 13, the head of which isrecessed, as at 14, to receive the boss and to form a rim 15, whichcontacts with the lap of the arm 7.

When it is desired to fold the square, the thumb-screw is taken out orwithdrawn a sufiicient distance to allow the joint to be broken and thearms turned into parallelism. The arms can then be clamped by thethumb-screw to obviate the danger of loss of any of the parts. W'hen itis desired to use the square, the joint is made and clamped in anobvious manner.

Having thus described the invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. A square comprising two arms joined by a lap-joint at their ends, thelaps being interlocked by an angular mortise in one of the laps and acorresponding tenon integral with the other.

2. A square comprising two arms lapped at the ends, said arms having aninterlocking angular mortise and tenon, Vand a thumbscrew engaging thearms to clamp the same together.

3. A square comprising two separable arms the ends of which arc joinedby a lap-joint and angular mortise and tenon, the edges of the mortiseand tenon being beveled, and means to clamp the arms together at saidends.

4. A square comprising two arms lapped at the ends, one of said armshaving an angular tenon and the other a corresponding mortisetherethrough to receive said tenon, and a binding-screw engaging thetenon, said screw having a head projecting beyond the edge of the tenonand engaging the arm having the mortise.

In testimony whereof I affix my signature in presence of two witnesses.

J OIIN PHILLIPS.

Witnesses:

NELLIE FnLTsKoG, HARRY G. BArcHELoR.

